Thursday, August 2, 2012

WHY PETROL ENGINES ARE MORE POWERFUL THAN DIESEL ENGINES FOR THE SAME CUBIC CAPACITY?

Due to greater compression ratios and higher burning temperatures the diesel engine has a thermodynamic cycle that is basically more efficient than that of the gasoline engine. Then it uses less fuel per unit of power produced, but in order to do this it needs more space inside the cylinders to make the best use of the more extreme pressure and gas expansion characteristic. 

Consequently, when the two engines being compared have the same volumetric capacities, than the amount of power of the gasoline engine is more, but it takes more fuel and a greater heat loss to achieve this.

5 comments:

SaiKeerthi sudha said...

Interesting facts about petrol engines and diesel engines.

Violet Jessy said...

Petrol engines are safer than diesel engines!

Anand J said...

Nice one about the petrol engines!

Will Jenkins said...

Very cool! I'm starting to get into cars and wanted to understand diesel a little better. I just know they are usually more fuel efficient?

Will Jenkins | http://puredieselpower.com/chevy-gm-products/

jerome figueroa said...

Diesels use air compression to create combustion versus the air/fuel mixture required by gasoline powered cars. This attribute means that diesel engines do not require spark plugs and thus do not have to be tuned up.

Diesel fuel has a higher fuel density than gasoline resulting in fuel economy increases of 20-30% over comparable gasoline powered models.

Diesel engines are cheaper to maintain as they have less parts vs. a gasoline engine. The lifespan of a diesel engine is also significantly longer.



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